githubFork/roundcubemail.git

			@@ -18,9 +18,6 @@
			+-----------------------------------------------------------------------+
			\| Author: Thomas Bruederli <roundcube@gmail.com> \|
			+-----------------------------------------------------------------------+

			$Id$

			*/


			@@ -28,387 +25,372 @@
			* Base class of the Roundcube Framework
			* implemented as singleton
			*
			* @package Core
			* @package Framework
			* @subpackage Core
			*/
			class rcube
			{
			const INIT_WITH_DB = 1;
			const INIT_WITH_PLUGINS = 2;
			const INIT_WITH_DB = 1;
			const INIT_WITH_PLUGINS = 2;

			/**
			* Singleton instace of rcube
			*
			* @var rcmail
			*/
			static protected $instance;
			/**
			* Singleton instace of rcube
			*
			* @var rcmail
			*/
			static protected $instance;

			/**
			* Stores instance of rcube_config.
			*
			* @var rcube_config
			*/
			public $config;
			/**
			* Stores instance of rcube_config.
			*
			* @var rcube_config
			*/
			public $config;

			/**
			* Instace of database class.
			*
			* @var rcube_mdb2
			*/
			public $db;
			/**
			* Instace of database class.
			*
			* @var rcube_db
			*/
			public $db;

			/**
			* Instace of Memcache class.
			*
			* @var rcube_mdb2
			*/
			public $memcache;
			/**
			* Instace of Memcache class.
			*
			* @var Memcache
			*/
			public $memcache;

			/**
			* Instace of rcube_session class.
			*
			* @var rcube_session
			*/
			public $session;
			/**
			* Instace of rcube_session class.
			*
			* @var rcube_session
			*/
			public $session;

			/**
			* Instance of rcube_smtp class.
			*
			* @var rcube_smtp
			*/
			public $smtp;
			/**
			* Instance of rcube_smtp class.
			*
			* @var rcube_smtp
			*/
			public $smtp;

			/**
			* Instance of rcube_storage class.
			*
			* @var rcube_storage
			*/
			public $storage;
			/**
			* Instance of rcube_storage class.
			*
			* @var rcube_storage
			*/
			public $storage;

			/**
			* Instance of rcube_output class.
			*
			* @var rcube_output
			*/
			public $output;
			/**
			* Instance of rcube_output class.
			*
			* @var rcube_output
			*/
			public $output;

			/**
			* Instance of rcube_plugin_api.
			*
			* @var rcube_plugin_api
			*/
			public $plugins;
			/**
			* Instance of rcube_plugin_api.
			*
			* @var rcube_plugin_api
			*/
			public $plugins;


			/* private/protected vars */
			protected $texts;
			protected $caches = array();
			protected $shutdown_functions = array();
			protected $expunge_cache = false;
			/* private/protected vars */
			protected $texts;
			protected $caches = array();
			protected $shutdown_functions = array();
			protected $expunge_cache = false;


			/**
			* This implements the 'singleton' design pattern
			*
			* @return rcube The one and only instance
			*/
			static function get_instance()
			{
			if (!self::$instance) {
			self::$instance = new rcube();
			/**
			* This implements the 'singleton' design pattern
			*
			* @param integer Options to initialize with this instance. See rcube::INIT_WITH_* constants
			*
			* @return rcube The one and only instance
			*/
			static function get_instance($mode = 0)
			{
			if (!self::$instance) {
			self::$instance = new rcube();
			self::$instance->init($mode);
			}

			return self::$instance;
			}

			return self::$instance;
			}

			/**
			* Private constructor
			*/
			protected function __construct()
			{
			// load configuration
			$this->config = new rcube_config;
			$this->plugins = new rcube_dummy_plugin_api;

			/**
			* Private constructor
			*/
			protected function __construct()
			{
			// load configuration
			$this->config = new rcube_config();
			$this->plugins = new rcube_dummy_plugin_api;

			register_shutdown_function(array($this, 'shutdown'));
			}


			/**
			* Initial startup function
			*/
			protected function init($mode = 0)
			{
			// initialize syslog
			if ($this->config->get('log_driver') == 'syslog') {
			$syslog_id = $this->config->get('syslog_id', 'roundcube');
			$syslog_facility = $this->config->get('syslog_facility', LOG_USER);
			openlog($syslog_id, LOG_ODELAY, $syslog_facility);
			register_shutdown_function(array($this, 'shutdown'));
			}

			// connect to database
			if ($mode & self::INIT_WITH_DB) {
			$this->get_dbh();

			/**
			* Initial startup function
			*/
			protected function init($mode = 0)
			{
			// initialize syslog
			if ($this->config->get('log_driver') == 'syslog') {
			$syslog_id = $this->config->get('syslog_id', 'roundcube');
			$syslog_facility = $this->config->get('syslog_facility', LOG_USER);
			openlog($syslog_id, LOG_ODELAY, $syslog_facility);
			}

			// connect to database
			if ($mode & self::INIT_WITH_DB) {
			$this->get_dbh();
			}

			// create plugin API and load plugins
			if ($mode & self::INIT_WITH_PLUGINS) {
			$this->plugins = rcube_plugin_api::get_instance();
			}
			}

			// create plugin API and load plugins
			if ($mode & self::INIT_WITH_PLUGINS) {
			$this->plugins = rcube_plugin_api::get_instance();
			}
			}

			/**
			* Get the current database connection
			*
			* @return rcube_db Database object
			*/
			public function get_dbh()
			{
			if (!$this->db) {
			$config_all = $this->config->all();
			$this->db = rcube_db::factory($config_all['db_dsnw'], $config_all['db_dsnr'], $config_all['db_persistent']);
			$this->db->set_debug((bool)$config_all['sql_debug']);
			}

			/**
			* Get the current database connection
			*
			* @return rcube_mdb2 Database connection object
			*/
			public function get_dbh()
			{
			if (!$this->db) {
			$config_all = $this->config->all();

			$this->db = new rcube_mdb2($config_all['db_dsnw'], $config_all['db_dsnr'], $config_all['db_persistent']);
			$this->db->sqlite_initials = INSTALL_PATH . 'SQL/sqlite.initial.sql';
			$this->db->set_debug((bool)$config_all['sql_debug']);
			return $this->db;
			}

			return $this->db;
			}

			/**
			* Get global handle for memcache access
			*
			* @return object Memcache
			*/
			public function get_memcache()
			{
			if (!isset($this->memcache)) {
			// no memcache support in PHP
			if (!class_exists('Memcache')) {
			$this->memcache = false;
			return false;
			}

			/**
			* Get global handle for memcache access
			*
			* @return object Memcache
			*/
			public function get_memcache()
			{
			if (!isset($this->memcache)) {
			// no memcache support in PHP
			if (!class_exists('Memcache')) {
			$this->memcache = false;
			return false;
			}
			$this->memcache = new Memcache;
			$this->mc_available = 0;

			$this->memcache = new Memcache;
			$this->mc_available = 0;
			// add all configured hosts to pool
			$pconnect = $this->config->get('memcache_pconnect', true);
			foreach ($this->config->get('memcache_hosts', array()) as $host) {
			if (substr($host, 0, 7) != 'unix://') {
			list($host, $port) = explode(':', $host);
			if (!$port) $port = 11211;
			}
			else {
			$port = 0;
			}

			// add alll configured hosts to pool
			$pconnect = $this->config->get('memcache_pconnect', true);
			foreach ($this->config->get('memcache_hosts', array()) as $host) {
			list($host, $port) = explode(':', $host);
			if (!$port) $port = 11211;
			$this->mc_available += intval($this->memcache->addServer($host, $port, $pconnect, 1, 1, 15, false, array($this, 'memcache_failure')));
			}
			$this->mc_available += intval($this->memcache->addServer(
			$host, $port, $pconnect, 1, 1, 15, false, array($this, 'memcache_failure')));
			}

			// test connection and failover (will result in $this->mc_available == 0 on complete failure)
			$this->memcache->increment('__CONNECTIONTEST__', 1); // NOP if key doesn't exist
			// test connection and failover (will result in $this->mc_available == 0 on complete failure)
			$this->memcache->increment('__CONNECTIONTEST__', 1); // NOP if key doesn't exist

			if (!$this->mc_available)
			$this->memcache = false;
			if (!$this->mc_available) {
			$this->memcache = false;
			}
			}

			return $this->memcache;
			}

			return $this->memcache;
			}

			/**
			* Callback for memcache failure
			*/
			public function memcache_failure($host, $port)
			{
			static $seen = array();

			/**
			* Callback for memcache failure
			*/
			public function memcache_failure($host, $port)
			{
			static $seen = array();

			// only report once
			if (!$seen["$host:$port"]++) {
			$this->mc_available--;
			self::raise_error(array('code' => 604, 'type' => 'db',
			'line' => __LINE__, 'file' => __FILE__,
			'message' => "Memcache failure on host $host:$port"),
			true, false);
			}
			}


			/**
			* Initialize and get cache object
			*
			* @param string $name Cache identifier
			* @param string $type Cache type ('db', 'apc' or 'memcache')
			* @param string $ttl Expiration time for cache items
			* @param bool $packed Enables/disables data serialization
			*
			* @return rcube_cache Cache object
			*/
			public function get_cache($name, $type='db', $ttl=0, $packed=true)
			{
			if (!isset($this->caches[$name])) {
			$userid = $this->get_user_id();
			$this->caches[$name] = new rcube_cache($type, $userid, $name, $ttl, $packed);
			// only report once
			if (!$seen["$host:$port"]++) {
			$this->mc_available--;
			self::raise_error(array(
			'code' => 604, 'type' => 'db',
			'line' => __LINE__, 'file' => __FILE__,
			'message' => "Memcache failure on host $host:$port"),
			true, false);
			}
			}

			return $this->caches[$name];
			}

			/**
			* Initialize and get cache object
			*
			* @param string $name Cache identifier
			* @param string $type Cache type ('db', 'apc' or 'memcache')
			* @param string $ttl Expiration time for cache items
			* @param bool $packed Enables/disables data serialization
			*
			* @return rcube_cache Cache object
			*/
			public function get_cache($name, $type='db', $ttl=0, $packed=true)
			{
			if (!isset($this->caches[$name]) && ($userid = $this->get_user_id())) {
			$this->caches[$name] = new rcube_cache($type, $userid, $name, $ttl, $packed);
			}

			/**
			* Create SMTP object and connect to server
			*
			* @param boolean True if connection should be established
			*/
			public function smtp_init($connect = false)
			{
			$this->smtp = new rcube_smtp();

			if ($connect)
			$this->smtp->connect();
			}


			/**
			* Initialize and get storage object
			*
			* @return rcube_storage Storage object
			*/
			public function get_storage()
			{
			// already initialized
			if (!is_object($this->storage)) {
			$this->storage_init();
			return $this->caches[$name];
			}

			return $this->storage;
			}

			/**
			* Create SMTP object and connect to server
			*
			* @param boolean True if connection should be established
			*/
			public function smtp_init($connect = false)
			{
			$this->smtp = new rcube_smtp();

			/**
			* Initialize storage object
			*/
			public function storage_init()
			{
			// already initialized
			if (is_object($this->storage)) {
			return;
			if ($connect) {
			$this->smtp->connect();
			}
			}

			$driver = $this->config->get('storage_driver', 'imap');
			$driver_class = "rcube_{$driver}";

			if (!class_exists($driver_class)) {
			self::raise_error(array(
			'code' => 700, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Storage driver class ($driver) not found!"),
			true, true);
			/**
			* Initialize and get storage object
			*
			* @return rcube_storage Storage object
			*/
			public function get_storage()
			{
			// already initialized
			if (!is_object($this->storage)) {
			$this->storage_init();
			}

			return $this->storage;
			}

			// Initialize storage object
			$this->storage = new $driver_class;

			// for backward compat. (deprecated, will be removed)
			$this->imap = $this->storage;
			/**
			* Initialize storage object
			*/
			public function storage_init()
			{
			// already initialized
			if (is_object($this->storage)) {
			return;
			}

			// enable caching of mail data
			$storage_cache = $this->config->get("{$driver}_cache");
			$messages_cache = $this->config->get('messages_cache');
			// for backward compatybility
			if ($storage_cache === null && $messages_cache === null && $this->config->get('enable_caching')) {
			$storage_cache = 'db';
			$messages_cache = true;
			}
			$driver = $this->config->get('storage_driver', 'imap');
			$driver_class = "rcube_{$driver}";

			if ($storage_cache)
			$this->storage->set_caching($storage_cache);
			if ($messages_cache)
			$this->storage->set_messages_caching(true);
			if (!class_exists($driver_class)) {
			self::raise_error(array(
			'code' => 700, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Storage driver class ($driver) not found!"),
			true, true);
			}

			// set pagesize from config
			$pagesize = $this->config->get('mail_pagesize');
			if (!$pagesize) {
			$pagesize = $this->config->get('pagesize', 50);
			}
			$this->storage->set_pagesize($pagesize);
			// Initialize storage object
			$this->storage = new $driver_class;

			// set class options
			$options = array(
			'auth_type' => $this->config->get("{$driver}_auth_type", 'check'),
			'auth_cid' => $this->config->get("{$driver}_auth_cid"),
			'auth_pw' => $this->config->get("{$driver}_auth_pw"),
			'debug' => (bool) $this->config->get("{$driver}_debug"),
			'force_caps' => (bool) $this->config->get("{$driver}_force_caps"),
			'timeout' => (int) $this->config->get("{$driver}_timeout"),
			'skip_deleted' => (bool) $this->config->get('skip_deleted'),
			'driver' => $driver,
			);
			// for backward compat. (deprecated, will be removed)
			$this->imap = $this->storage;

			if (!empty($_SESSION['storage_host'])) {
			$options['host'] = $_SESSION['storage_host'];
			$options['user'] = $_SESSION['username'];
			$options['port'] = $_SESSION['storage_port'];
			$options['ssl'] = $_SESSION['storage_ssl'];
			$options['password'] = $this->decrypt($_SESSION['password']);
			}
			// enable caching of mail data
			$storage_cache = $this->config->get("{$driver}_cache");
			$messages_cache = $this->config->get('messages_cache');
			// for backward compatybility
			if ($storage_cache === null && $messages_cache === null && $this->config->get('enable_caching')) {
			$storage_cache = 'db';
			$messages_cache = true;
			}

			$options = $this->plugins->exec_hook("storage_init", $options);
			if ($storage_cache) {
			$this->storage->set_caching($storage_cache);
			}
			if ($messages_cache) {
			$this->storage->set_messages_caching(true);
			}

			// for backward compat. (deprecated, to be removed)
			$options = $this->plugins->exec_hook("imap_init", $options);
			// set pagesize from config
			$pagesize = $this->config->get('mail_pagesize');
			if (!$pagesize) {
			$pagesize = $this->config->get('pagesize', 50);
			}
			$this->storage->set_pagesize($pagesize);

			$this->storage->set_options($options);
			$this->set_storage_prop();
			}
			// set class options
			$options = array(
			'auth_type' => $this->config->get("{$driver}_auth_type", 'check'),
			'auth_cid' => $this->config->get("{$driver}_auth_cid"),
			'auth_pw' => $this->config->get("{$driver}_auth_pw"),
			'debug' => (bool) $this->config->get("{$driver}_debug"),
			'force_caps' => (bool) $this->config->get("{$driver}_force_caps"),
			'timeout' => (int) $this->config->get("{$driver}_timeout"),
			'skip_deleted' => (bool) $this->config->get('skip_deleted'),
			'driver' => $driver,
			);

			if (!empty($_SESSION['storage_host'])) {
			$options['host'] = $_SESSION['storage_host'];
			$options['user'] = $_SESSION['username'];
			$options['port'] = $_SESSION['storage_port'];
			$options['ssl'] = $_SESSION['storage_ssl'];
			$options['password'] = $this->decrypt($_SESSION['password']);
			$_SESSION[$driver.'_host'] = $_SESSION['storage_host'];
			}

			/**
			* Connect to the mail storage server with stored session data
			*
			* @return bool True on success, False on error
			*/
			public function storage_connect()
			{
			$storage = $this->get_storage();
			$options = $this->plugins->exec_hook("storage_init", $options);

			if ($_SESSION['storage_host'] && !$storage->is_connected()) {
			$host = $_SESSION['storage_host'];
			$user = $_SESSION['username'];
			$port = $_SESSION['storage_port'];
			$ssl = $_SESSION['storage_ssl'];
			$pass = $this->decrypt($_SESSION['password']);
			// for backward compat. (deprecated, to be removed)
			$options = $this->plugins->exec_hook("imap_init", $options);

			if (!$storage->connect($host, $user, $pass, $port, $ssl)) {
			if (is_object($this->output))
			$this->output->show_message($storage->get_error_code() == -1 ? 'storageerror' : 'sessionerror', 'error');
			}
			else {
			$this->storage->set_options($options);
			$this->set_storage_prop();
			return $storage->is_connected();
			}
			}

			return false;
			}

			/**
			* Set storage parameters.
			* This must be done AFTER connecting to the server!
			*/
			protected function set_storage_prop()
			{
			$storage = $this->get_storage();
			/**
			* Set storage parameters.
			* This must be done AFTER connecting to the server!
			*/
			protected function set_storage_prop()
			{
			$storage = $this->get_storage();

			$storage->set_charset($this->config->get('default_charset', RCMAIL_CHARSET));
			$storage->set_charset($this->config->get('default_charset', RCMAIL_CHARSET));

			if ($default_folders = $this->config->get('default_folders')) {
			$storage->set_default_folders($default_folders);
			if ($default_folders = $this->config->get('default_folders')) {
			$storage->set_default_folders($default_folders);
			}
			if (isset($_SESSION['mbox'])) {
			$storage->set_folder($_SESSION['mbox']);
			}
			if (isset($_SESSION['page'])) {
			$storage->set_page($_SESSION['page']);
			}
			}
			if (isset($_SESSION['mbox'])) {
			$storage->set_folder($_SESSION['mbox']);
			}
			if (isset($_SESSION['page'])) {
			$storage->set_page($_SESSION['page']);
			}
			}


			/**
			@@ -423,11 +405,16 @@

			$sess_name = $this->config->get('session_name');
			$sess_domain = $this->config->get('session_domain');
			$sess_path = $this->config->get('session_path');
			$lifetime = $this->config->get('session_lifetime', 0) * 60;

			// set session domain
			if ($sess_domain) {
			ini_set('session.cookie_domain', $sess_domain);
			}
			// set session path
			if ($sess_path) {
			ini_set('session.cookie_path', $sess_path);
			}
			// set session garbage collecting time according to session_lifetime
			if ($lifetime) {
			@@ -439,6 +426,7 @@
			ini_set('session.use_cookies', 1);
			ini_set('session.use_only_cookies', 1);
			ini_set('session.serialize_handler', 'php');
			ini_set('session.cookie_httponly', 1);

			// use database for storing session data
			$this->session = new rcube_session($this->get_dbh(), $this->config);
			@@ -475,7 +463,7 @@
			$this->session->set_keep_alive($keep_alive);
			}

			$this->session->set_secret($this->config->get('des_key') . $_SERVER['HTTP_USER_AGENT']);
			$this->session->set_secret($this->config->get('des_key') . dirname($_SERVER['SCRIPT_NAME']));
			$this->session->set_ip_check($this->config->get('ip_check'));
			}

			@@ -517,433 +505,469 @@
			}


			/**
			* Get localized text in the desired language
			*
			* @param mixed $attrib Named parameters array or label name
			* @param string $domain Label domain (plugin) name
			*
			* @return string Localized text
			*/
			public function gettext($attrib, $domain=null)
			{
			// load localization files if not done yet
			if (empty($this->texts))
			$this->load_language();

			// extract attributes
			if (is_string($attrib))
			$attrib = array('name' => $attrib);

			$name = $attrib['name'] ? $attrib['name'] : '';

			// attrib contain text values: use them from now
			if (($setval = $attrib[strtolower($_SESSION['language'])]) \|\| ($setval = $attrib['en_us']))
			$this->texts[$name] = $setval;

			// check for text with domain
			if ($domain && ($text = $this->texts[$domain.'.'.$name]))
			;
			// text does not exist
			else if (!($text = $this->texts[$name])) {
			return "[$name]";
			}

			// replace vars in text
			if (is_array($attrib['vars'])) {
			foreach ($attrib['vars'] as $var_key => $var_value)
			$text = str_replace($var_key[0]!='$' ? '$'.$var_key : $var_key, $var_value, $text);
			}

			// format output
			if (($attrib['uppercase'] && strtolower($attrib['uppercase']=='first')) \|\| $attrib['ucfirst'])
			return ucfirst($text);
			else if ($attrib['uppercase'])
			return mb_strtoupper($text);
			else if ($attrib['lowercase'])
			return mb_strtolower($text);

			return strtr($text, array('\n' => "\n"));
			}


			/**
			* Check if the given text label exists
			*
			* @param string $name Label name
			* @param string $domain Label domain (plugin) name or '*' for all domains
			* @param string $ref_domain Sets domain name if label is found
			*
			* @return boolean True if text exists (either in the current language or in en_US)
			*/
			public function text_exists($name, $domain = null, &$ref_domain = null)
			{
			// load localization files if not done yet
			if (empty($this->texts))
			$this->load_language();

			if (isset($this->texts[$name])) {
			$ref_domain = '';
			return true;
			}

			// any of loaded domains (plugins)
			if ($domain == '*') {
			foreach ($this->plugins->loaded_plugins() as $domain)
			if (isset($this->texts[$domain.'.'.$name])) {
			$ref_domain = $domain;
			return true;
			}
			}
			// specified domain
			else if ($domain) {
			$ref_domain = $domain;
			return isset($this->texts[$domain.'.'.$name]);
			}

			return false;
			}

			/**
			* Load a localization package
			*
			* @param string Language ID
			*/
			public function load_language($lang = null, $add = array())
			{
			$lang = $this->language_prop(($lang ? $lang : $_SESSION['language']));

			// load localized texts
			if (empty($this->texts) \|\| $lang != $_SESSION['language']) {
			$this->texts = array();

			// handle empty lines after closing PHP tag in localization files
			ob_start();

			// get english labels (these should be complete)
			@include(INSTALL_PATH . 'program/localization/en_US/labels.inc');
			@include(INSTALL_PATH . 'program/localization/en_US/messages.inc');

			if (is_array($labels))
			$this->texts = $labels;
			if (is_array($messages))
			$this->texts = array_merge($this->texts, $messages);

			// include user language files
			if ($lang != 'en' && is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
			include_once(INSTALL_PATH . 'program/localization/' . $lang . '/labels.inc');
			include_once(INSTALL_PATH . 'program/localization/' . $lang . '/messages.inc');

			if (is_array($labels))
			$this->texts = array_merge($this->texts, $labels);
			if (is_array($messages))
			$this->texts = array_merge($this->texts, $messages);
			}

			ob_end_clean();

			$_SESSION['language'] = $lang;
			}

			// append additional texts (from plugin)
			if (is_array($add) && !empty($add))
			$this->texts += $add;
			}


			/**
			* Check the given string and return a valid language code
			*
			* @param string Language code
			* @return string Valid language code
			*/
			protected function language_prop($lang)
			{
			static $rcube_languages, $rcube_language_aliases;

			// user HTTP_ACCEPT_LANGUAGE if no language is specified
			if (empty($lang) \|\| $lang == 'auto') {
			$accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
			$lang = str_replace('-', '_', $accept_langs[0]);
			}

			if (empty($rcube_languages)) {
			@include(INSTALL_PATH . 'program/localization/index.inc');
			}

			// check if we have an alias for that language
			if (!isset($rcube_languages[$lang]) && isset($rcube_language_aliases[$lang])) {
			$lang = $rcube_language_aliases[$lang];
			}
			// try the first two chars
			else if (!isset($rcube_languages[$lang])) {
			$short = substr($lang, 0, 2);

			// check if we have an alias for the short language code
			if (!isset($rcube_languages[$short]) && isset($rcube_language_aliases[$short])) {
			$lang = $rcube_language_aliases[$short];
			}
			// expand 'nn' to 'nn_NN'
			else if (!isset($rcube_languages[$short])) {
			$lang = $short.'_'.strtoupper($short);
			}
			}

			if (!isset($rcube_languages[$lang]) \|\| !is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
			$lang = 'en_US';
			}

			return $lang;
			}


			/**
			* Read directory program/localization and return a list of available languages
			*
			* @return array List of available localizations
			*/
			public function list_languages()
			{
			static $sa_languages = array();

			if (!sizeof($sa_languages)) {
			@include(INSTALL_PATH . 'program/localization/index.inc');

			if ($dh = @opendir(INSTALL_PATH . 'program/localization')) {
			while (($name = readdir($dh)) !== false) {
			if ($name[0] == '.' \|\| !is_dir(INSTALL_PATH . 'program/localization/' . $name))
			continue;

			if ($label = $rcube_languages[$name])
			$sa_languages[$name] = $label;
			}
			closedir($dh);
			}
			}

			return $sa_languages;
			}


			/**
			* Encrypt using 3DES
			*
			* @param string $clear clear text input
			* @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
			* @param boolean $base64 whether or not to base64_encode() the result before returning
			*
			* @return string encrypted text
			*/
			public function encrypt($clear, $key = 'des_key', $base64 = true)
			{
			if (!$clear)
			return '';

			/*-
			* Add a single canary byte to the end of the clear text, which
			* will help find out how much of padding will need to be removed
			* upon decryption; see http://php.net/mcrypt_generic#68082
			/**
			* Get localized text in the desired language
			*
			* @param mixed $attrib Named parameters array or label name
			* @param string $domain Label domain (plugin) name
			*
			* @return string Localized text
			*/
			$clear = pack("a*H2", $clear, "80");
			public function gettext($attrib, $domain=null)
			{
			// load localization files if not done yet
			if (empty($this->texts)) {
			$this->load_language();
			}

			if (function_exists('mcrypt_module_open') &&
			($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, ""))) {
			$iv = $this->create_iv(mcrypt_enc_get_iv_size($td));
			mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
			$cipher = $iv . mcrypt_generic($td, $clear);
			mcrypt_generic_deinit($td);
			mcrypt_module_close($td);
			}
			else {
			@include_once 'des.inc';
			// extract attributes
			if (is_string($attrib)) {
			$attrib = array('name' => $attrib);
			}

			if (function_exists('des')) {
			$des_iv_size = 8;
			$iv = $this->create_iv($des_iv_size);
			$cipher = $iv . des($this->config->get_crypto_key($key), $clear, 1, 1, $iv);
			}
			else {
			self::raise_error(array(
			'code' => 500, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not perform encryption; make sure Mcrypt is installed or lib/des.inc is available"
			), true, true);
			}
			$name = $attrib['name'] ? $attrib['name'] : '';

			// attrib contain text values: use them from now
			if (($setval = $attrib[strtolower($_SESSION['language'])]) \|\| ($setval = $attrib['en_us'])) {
			$this->texts[$name] = $setval;
			}

			// check for text with domain
			if ($domain && ($text = $this->texts[$domain.'.'.$name])) {
			}
			// text does not exist
			else if (!($text = $this->texts[$name])) {
			return "[$name]";
			}

			// replace vars in text
			if (is_array($attrib['vars'])) {
			foreach ($attrib['vars'] as $var_key => $var_value) {
			$text = str_replace($var_key[0]!='$' ? '$'.$var_key : $var_key, $var_value, $text);
			}
			}

			// format output
			if (($attrib['uppercase'] && strtolower($attrib['uppercase'] == 'first')) \|\| $attrib['ucfirst']) {
			return ucfirst($text);
			}
			else if ($attrib['uppercase']) {
			return mb_strtoupper($text);
			}
			else if ($attrib['lowercase']) {
			return mb_strtolower($text);
			}

			return strtr($text, array('\n' => "\n"));
			}

			return $base64 ? base64_encode($cipher) : $cipher;
			}

			/**
			* Decrypt 3DES-encrypted string
			*
			* @param string $cipher encrypted text
			* @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
			* @param boolean $base64 whether or not input is base64-encoded
			*
			* @return string decrypted text
			*/
			public function decrypt($cipher, $key = 'des_key', $base64 = true)
			{
			if (!$cipher)
			return '';
			/**
			* Check if the given text label exists
			*
			* @param string $name Label name
			* @param string $domain Label domain (plugin) name or '*' for all domains
			* @param string $ref_domain Sets domain name if label is found
			*
			* @return boolean True if text exists (either in the current language or in en_US)
			*/
			public function text_exists($name, $domain = null, &$ref_domain = null)
			{
			// load localization files if not done yet
			if (empty($this->texts)) {
			$this->load_language();
			}

			$cipher = $base64 ? base64_decode($cipher) : $cipher;
			if (isset($this->texts[$name])) {
			$ref_domain = '';
			return true;
			}

			if (function_exists('mcrypt_module_open') &&
			($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, ""))) {
			$iv_size = mcrypt_enc_get_iv_size($td);
			$iv = substr($cipher, 0, $iv_size);
			// any of loaded domains (plugins)
			if ($domain == '*') {
			foreach ($this->plugins->loaded_plugins() as $domain) {
			if (isset($this->texts[$domain.'.'.$name])) {
			$ref_domain = $domain;
			return true;
			}
			}
			}
			// specified domain
			else if ($domain) {
			$ref_domain = $domain;
			return isset($this->texts[$domain.'.'.$name]);
			}

			// session corruption? (#1485970)
			if (strlen($iv) < $iv_size)
			return false;
			}


			/**
			* Load a localization package
			*
			* @param string Language ID
			* @param array Additional text labels/messages
			*/
			public function load_language($lang = null, $add = array())
			{
			$lang = $this->language_prop(($lang ? $lang : $_SESSION['language']));

			// load localized texts
			if (empty($this->texts) \|\| $lang != $_SESSION['language']) {
			$this->texts = array();

			// handle empty lines after closing PHP tag in localization files
			ob_start();

			// get english labels (these should be complete)
			@include(INSTALL_PATH . 'program/localization/en_US/labels.inc');
			@include(INSTALL_PATH . 'program/localization/en_US/messages.inc');

			if (is_array($labels))
			$this->texts = $labels;
			if (is_array($messages))
			$this->texts = array_merge($this->texts, $messages);

			// include user language files
			if ($lang != 'en' && $lang != 'en_US' && is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
			include_once(INSTALL_PATH . 'program/localization/' . $lang . '/labels.inc');
			include_once(INSTALL_PATH . 'program/localization/' . $lang . '/messages.inc');

			if (is_array($labels))
			$this->texts = array_merge($this->texts, $labels);
			if (is_array($messages))
			$this->texts = array_merge($this->texts, $messages);
			}

			ob_end_clean();

			$_SESSION['language'] = $lang;
			}

			// append additional texts (from plugin)
			if (is_array($add) && !empty($add)) {
			$this->texts += $add;
			}
			}


			/**
			* Check the given string and return a valid language code
			*
			* @param string Language code
			*
			* @return string Valid language code
			*/
			protected function language_prop($lang)
			{
			static $rcube_languages, $rcube_language_aliases;

			// user HTTP_ACCEPT_LANGUAGE if no language is specified
			if (empty($lang) \|\| $lang == 'auto') {
			$accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
			$lang = str_replace('-', '_', $accept_langs[0]);
			}

			if (empty($rcube_languages)) {
			@include(INSTALL_PATH . 'program/localization/index.inc');
			}

			// check if we have an alias for that language
			if (!isset($rcube_languages[$lang]) && isset($rcube_language_aliases[$lang])) {
			$lang = $rcube_language_aliases[$lang];
			}
			// try the first two chars
			else if (!isset($rcube_languages[$lang])) {
			$short = substr($lang, 0, 2);

			// check if we have an alias for the short language code
			if (!isset($rcube_languages[$short]) && isset($rcube_language_aliases[$short])) {
			$lang = $rcube_language_aliases[$short];
			}
			// expand 'nn' to 'nn_NN'
			else if (!isset($rcube_languages[$short])) {
			$lang = $short.'_'.strtoupper($short);
			}
			}

			if (!isset($rcube_languages[$lang]) \|\| !is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
			$lang = 'en_US';
			}

			return $lang;
			}


			/**
			* Read directory program/localization and return a list of available languages
			*
			* @return array List of available localizations
			*/
			public function list_languages()
			{
			static $sa_languages = array();

			if (!sizeof($sa_languages)) {
			@include(INSTALL_PATH . 'program/localization/index.inc');

			if ($dh = @opendir(INSTALL_PATH . 'program/localization')) {
			while (($name = readdir($dh)) !== false) {
			if ($name[0] == '.' \|\| !is_dir(INSTALL_PATH . 'program/localization/' . $name)) {
			continue;
			}

			if ($label = $rcube_languages[$name]) {
			$sa_languages[$name] = $label;
			}
			}
			closedir($dh);
			}
			}

			return $sa_languages;
			}


			/**
			* Encrypt using 3DES
			*
			* @param string $clear clear text input
			* @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
			* @param boolean $base64 whether or not to base64_encode() the result before returning
			*
			* @return string encrypted text
			*/
			public function encrypt($clear, $key = 'des_key', $base64 = true)
			{
			if (!$clear) {
			return '';
			}

			/*-
			* Add a single canary byte to the end of the clear text, which
			* will help find out how much of padding will need to be removed
			* upon decryption; see http://php.net/mcrypt_generic#68082
			*/
			$clear = pack("a*H2", $clear, "80");

			if (function_exists('mcrypt_module_open') &&
			($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, ""))
			) {
			$iv = $this->create_iv(mcrypt_enc_get_iv_size($td));
			mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
			$cipher = $iv . mcrypt_generic($td, $clear);
			mcrypt_generic_deinit($td);
			mcrypt_module_close($td);
			}
			else {
			@include_once 'des.inc';

			if (function_exists('des')) {
			$des_iv_size = 8;
			$iv = $this->create_iv($des_iv_size);
			$cipher = $iv . des($this->config->get_crypto_key($key), $clear, 1, 1, $iv);
			}
			else {
			self::raise_error(array(
			'code' => 500, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not perform encryption; make sure Mcrypt is installed or lib/des.inc is available"
			), true, true);
			}
			}

			return $base64 ? base64_encode($cipher) : $cipher;
			}


			/**
			* Decrypt 3DES-encrypted string
			*
			* @param string $cipher encrypted text
			* @param string $key encryption key to retrieve from the configuration, defaults to 'des_key'
			* @param boolean $base64 whether or not input is base64-encoded
			*
			* @return string decrypted text
			*/
			public function decrypt($cipher, $key = 'des_key', $base64 = true)
			{
			if (!$cipher) {
			return '';
			}

			$cipher = $base64 ? base64_decode($cipher) : $cipher;

			if (function_exists('mcrypt_module_open') &&
			($td = mcrypt_module_open(MCRYPT_TripleDES, "", MCRYPT_MODE_CBC, ""))
			) {
			$iv_size = mcrypt_enc_get_iv_size($td);
			$iv = substr($cipher, 0, $iv_size);

			// session corruption? (#1485970)
			if (strlen($iv) < $iv_size) {
			return '';
			}

			$cipher = substr($cipher, $iv_size);
			mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
			$clear = mdecrypt_generic($td, $cipher);
			mcrypt_generic_deinit($td);
			mcrypt_module_close($td);
			}
			else {
			@include_once 'des.inc';

			if (function_exists('des')) {
			$des_iv_size = 8;
			$iv = substr($cipher, 0, $des_iv_size);
			$cipher = substr($cipher, $des_iv_size);
			$clear = des($this->config->get_crypto_key($key), $cipher, 0, 1, $iv);
			}
			else {
			self::raise_error(array(
			'code' => 500, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not perform decryption; make sure Mcrypt is installed or lib/des.inc is available"
			), true, true);
			}
			}

			/*-
			* Trim PHP's padding and the canary byte; see note in
			* rcube::encrypt() and http://php.net/mcrypt_generic#68082
			*/
			$clear = substr(rtrim($clear, "\0"), 0, -1);

			return $clear;
			}


			/**
			* Generates encryption initialization vector (IV)
			*
			* @param int Vector size
			*
			* @return string Vector string
			*/
			private function create_iv($size)
			{
			// mcrypt_create_iv() can be slow when system lacks entrophy
			// we'll generate IV vector manually
			$iv = '';
			for ($i = 0; $i < $size; $i++) {
			$iv .= chr(mt_rand(0, 255));
			}

			return $iv;
			}


			/**
			* Build a valid URL to this instance of Roundcube
			*
			* @param mixed Either a string with the action or url parameters as key-value pairs
			* @return string Valid application URL
			*/
			public function url($p)
			{
			// STUB: should be overloaded by the application
			return '';

			$cipher = substr($cipher, $iv_size);
			mcrypt_generic_init($td, $this->config->get_crypto_key($key), $iv);
			$clear = mdecrypt_generic($td, $cipher);
			mcrypt_generic_deinit($td);
			mcrypt_module_close($td);
			}
			else {
			@include_once 'des.inc';

			if (function_exists('des')) {
			$des_iv_size = 8;
			$iv = substr($cipher, 0, $des_iv_size);
			$cipher = substr($cipher, $des_iv_size);
			$clear = des($this->config->get_crypto_key($key), $cipher, 0, 1, $iv);
			}
			else {
			self::raise_error(array(
			'code' => 500, 'type' => 'php',
			'file' => __FILE__, 'line' => __LINE__,
			'message' => "Could not perform decryption; make sure Mcrypt is installed or lib/des.inc is available"
			), true, true);
			}
			}

			/*-
			* Trim PHP's padding and the canary byte; see note in
			* rcube::encrypt() and http://php.net/mcrypt_generic#68082

			/**
			* Function to be executed in script shutdown
			* Registered with register_shutdown_function()
			*/
			$clear = substr(rtrim($clear, "\0"), 0, -1);

			return $clear;
			}

			/**
			* Generates encryption initialization vector (IV)
			*
			* @param int Vector size
			* @return string Vector string
			*/
			private function create_iv($size)
			{
			// mcrypt_create_iv() can be slow when system lacks entrophy
			// we'll generate IV vector manually
			$iv = '';
			for ($i = 0; $i < $size; $i++)
			$iv .= chr(mt_rand(0, 255));
			return $iv;
			}


			/**
			* Build a valid URL to this instance of Roundcube
			*
			* @param mixed Either a string with the action or url parameters as key-value pairs
			* @return string Valid application URL
			*/
			public function url($p)
			{
			// STUB: should be overloaded by the application
			return '';
			}


			/**
			* Function to be executed in script shutdown
			* Registered with register_shutdown_function()
			*/
			public function shutdown()
			{
			foreach ($this->shutdown_functions as $function)
			call_user_func($function);

			if (is_object($this->smtp))
			$this->smtp->disconnect();

			foreach ($this->caches as $cache) {
			if (is_object($cache))
			$cache->close();
			}

			if (is_object($this->storage)) {
			if ($this->expunge_cache)
			$this->storage->expunge_cache();
			$this->storage->close();
			}
			}


			/**
			* Registers shutdown function to be executed on shutdown.
			* The functions will be executed before destroying any
			* objects like smtp, imap, session, etc.
			*
			* @param callback Function callback
			*/
			public function add_shutdown_function($function)
			{
			$this->shutdown_functions[] = $function;
			}


			/**
			* Construct shell command, execute it and return output as string.
			* Keywords {keyword} are replaced with arguments
			*
			* @param $cmd Format string with {keywords} to be replaced
			* @param $values (zero, one or more arrays can be passed)
			* @return output of command. shell errors not detectable
			*/
			public static function exec(/* $cmd, $values1 = array(), ... */)
			{
			$args = func_get_args();
			$cmd = array_shift($args);
			$values = $replacements = array();

			// merge values into one array
			foreach ($args as $arg)
			$values += (array)$arg;

			preg_match_all('/({(-?)([a-z]\w*)})/', $cmd, $matches, PREG_SET_ORDER);
			foreach ($matches as $tags) {
			list(, $tag, $option, $key) = $tags;
			$parts = array();

			if ($option) {
			foreach ((array)$values["-$key"] as $key => $value) {
			if ($value === true \|\| $value === false \|\| $value === null)
			$parts[] = $value ? $key : "";
			else foreach ((array)$value as $val)
			$parts[] = "$key " . escapeshellarg($val);
			public function shutdown()
			{
			foreach ($this->shutdown_functions as $function) {
			call_user_func($function);
			}
			}
			else {
			foreach ((array)$values[$key] as $value)
			$parts[] = escapeshellarg($value);
			}

			$replacements[$tag] = join(" ", $parts);
			if (is_object($this->smtp)) {
			$this->smtp->disconnect();
			}

			foreach ($this->caches as $cache) {
			if (is_object($cache)) {
			$cache->close();
			}
			}

			if (is_object($this->storage)) {
			if ($this->expunge_cache) {
			$this->storage->expunge_cache();
			}
			$this->storage->close();
			}
			}

			// use strtr behaviour of going through source string once
			$cmd = strtr($cmd, $replacements);

			return (string)shell_exec($cmd);
			}
			/**
			* Registers shutdown function to be executed on shutdown.
			* The functions will be executed before destroying any
			* objects like smtp, imap, session, etc.
			*
			* @param callback Function callback
			*/
			public function add_shutdown_function($function)
			{
			$this->shutdown_functions[] = $function;
			}


			/**
			* Construct shell command, execute it and return output as string.
			* Keywords {keyword} are replaced with arguments
			*
			* @param $cmd Format string with {keywords} to be replaced
			* @param $values (zero, one or more arrays can be passed)
			*
			* @return output of command. shell errors not detectable
			*/
			public static function exec(/* $cmd, $values1 = array(), ... */)
			{
			$args = func_get_args();
			$cmd = array_shift($args);
			$values = $replacements = array();

			// merge values into one array
			foreach ($args as $arg) {
			$values += (array)$arg;
			}

			preg_match_all('/({(-?)([a-z]\w*)})/', $cmd, $matches, PREG_SET_ORDER);
			foreach ($matches as $tags) {
			list(, $tag, $option, $key) = $tags;
			$parts = array();

			if ($option) {
			foreach ((array)$values["-$key"] as $key => $value) {
			if ($value === true \|\| $value === false \|\| $value === null) {
			$parts[] = $value ? $key : "";
			}
			else {
			foreach ((array)$value as $val) {
			$parts[] = "$key " . escapeshellarg($val);
			}
			}
			}
			}
			else {
			foreach ((array)$values[$key] as $value) {
			$parts[] = escapeshellarg($value);
			}
			}

			$replacements[$tag] = join(" ", $parts);
			}

			// use strtr behaviour of going through source string once
			$cmd = strtr($cmd, $replacements);

			return (string)shell_exec($cmd);
			}


			/**
			@@ -1049,6 +1073,18 @@
			*/
			public static function raise_error($arg = array(), $log = false, $terminate = false)
			{
			// handle PHP exceptions
			if (is_object($arg) && is_a($arg, 'Exception')) {
			$err = array(
			'type' => 'php',
			'code' => $arg->getCode(),
			'line' => $arg->getLine(),
			'file' => $arg->getFile(),
			'message' => $arg->getMessage(),
			);
			$arg = $err;
			}

			// installer
			if (class_exists('rcube_install', false)) {
			$rci = rcube_install::get_instance();
			@@ -1056,7 +1092,8 @@
			return;
			}

			if ($log && $arg['type'] && $arg['message']) {
			if (($log \|\| $terminate) && $arg['type'] && $arg['message']) {
			$arg['fatal'] = $terminate;
			self::log_bug($arg);
			}

			@@ -1084,7 +1121,7 @@
			}

			// write error to local log file
			if ($level & 1) {
			if (($level & 1) \|\| !empty($arg_arr['fatal'])) {
			if ($_SERVER['REQUEST_METHOD'] == 'POST') {
			$post_query = '?_task='.urlencode($_POST['_task']).'&_action='.urlencode($_POST['_action']);
			}